Watercraft other than those employed in interstate commerce are subject to valuation and assessment by parish Assessors. Gasoline powered watercraft and vessels employed in fishery activities for human consumption are exempt from property taxation. Watercraft are to be assessed in the parish where situated on January 1st. Watercraft engaged in interstate towing or barge line companies are assessed by the Louisiana Tax Commission.

LAT 11 is used to report watercraft, motor vessels, and barges other than those employed in interstate commerce.

LAT 11A is used to report Outer Continental Shelf Water Vessels.